UPDATE
With the new changes to the way HTML is rendered in titles,
this idea is now A Bad Thing To Do ™. Please
disregard this post and just think of it as a fossil. :P

A cool feature about your posts is the fact that you can
put HTML comments in the title of your post. Armed with
this feature, it is possible to put 'category markers' in
your node titles and use a script to find them and make
a nice list of your favorite nodes.

The following code will do just that, the demo is on my
home node. All you need to do is mark your favorite nodes
by hand with something
like <!--code--> or <!--obfu-->. Well that's
how i did it before i saw jcwren's Bulk Node Title Editor.

The side effect is that you have to link directly to a
node's id instead of it's name when referring to it in
other posts, chatbox, etc. But that's okay, you use id
tags, don't you? Hey Rocko! Ask 'em if they use id tags!

UPDATE: - after gleaming good security info from jcwren,
i changed this script to accept an interactive password
similiar to how mysql asks for passwords: you can specify
the password on the command line with the -p option
(dangerous for mulit-user boxes), or you can just specify
-p by itself and be prompted for the password. I use
Term::ReadKey to keep the password 'invisible'.